A Micro Structure POF Relative Humidity Sensor Modified With Agarose Based on Surface Plasmon Resonance and Evanescent Wave Loss  

作　　者：Yanjun HU Abdul GHAFFAR Yulong HOU Wenyi LIU Fei LI Jun WANG 

机构地区：[1]Science and Technology on Electronic Test&Measurement Laboratory,North University of China,Taiyuan 030051,China

出　　处：《Photonic Sensors》2021年第4期392-401,共10页光子传感器（英文版）

基　　金：This work was funded by the Fund of Shanxi“1331”Project Key Subject Construction;National Science Foundation of Shanxi Province,China(Grant No.20170ID 121065)。

摘　　要：A novel high sensitivity relative humidity(RH)sensor was proposed by using micro structure plastic optical fiber(POF)based on the surface plasmon resonance(SPR)effect and the evanescent wave(EW)loss.The micro structure was fabricated on the POF and coated with a gold layer and agarose,adopting the sputtering and dip-coating technique.These construction effects on the attenuation of power caused by the SPR effect and the EW loss were used to perform RH detections.The agarose9s different refractive indexes(RIs)caused fluctuations in the transmission power when the humidity increased.The demonstrated experimental results showed that the proposed sensor achieved a linear response from 20%RH to 80%RH with a high sensitivity of 0.595μW/%.The proposed sensor had the advantages of fast response and recovery.Furthermore,the temperature dependence and the repeatability test of the sensor were also performed.

关 键 词：SPR evanescent wave loss AGAROSE RH sensor 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]